Xchange

Sections:

• Import SLF Model File
• Import Mechanical Environment
• Import Test Data
• Export SLF File
• Export ADAMS/Solver Data

Import SLF Model File

The panel in Figure 1 is used to import an SLF model file or an existing SLF from the LifeMOD/BodySiM™ library. When a file or library model is selected, the items contained within the file will be displayed in the center section of the panel. At the bottom of the panel various items will be automatically checked indicating their presence in the file/library. The user then has the choice of selecting from the various entities which ones to create.

Items currently included in the library include:

• Full Body: Bed Settling
• Full Body: Dancing
• Full Body: Elliptical Exercise Machine
• Full Body: Exercise
• Full Body: Gait
• Full Body: Golfing
• Full Body: Lifting with Knees
• Full Body: Lifting with Hips
• Full Body: Stair Climb
• Full Body: Tennis
• Lower Body: Gait Case 1
• Lower Body: Gait Case 2
• Lower Body: Walk-Sit-Walk

After selecting what entities to create, selecting the Apply button will generate the model on the screen.

Figure 1: Panel used to import model file (SLF) or model from the library

Import Mechanical Environment

The panel in Figure 2 allows the user to import a mechanical environment from a file or from the library. The example below displays all the input file formats for the geometry/mechanical system. Existing ADAMS mechanical systems may be imported via a command file. For more information, see the Files Appendix. The Parasolids, shell, object and command file formats may be used to import individual objects.

The objects/systems present in the LifeMOD/BodySIM library include:

• Bed
• Bicycle (mechanical system with joints and forces)
• Cliff
• Golf Club Head
• Objects on Rack
• Stepper Machine (mechanical system with joints and forces)
• Tennis Ball
• Tennis Racket

Figure 2: Panel used to import a mechanical environment

Import Test Data

Figure 3 shows the panel used to import data into splines. These splines may be used as activation data for the Hill-based muscles (see Whiplash Tutorial) for example. The user can import data from a simple ASCII file or from a set contained in the library. The format for the ASCII file is a simple two-column format with the independent variable in the left column.

The current data sets contained in the library include:

• EMG_ON_175MS - simple EMG signal ramping to full activity at 175 milliseconds

Figure 3: Panel used to import test data.

Export SLF File

The panel displayed in Figure 4 allows the user to export the current model into a SLF file. Only the checked items will be exported.

Figure 4: Panel used to export the model in the SLF format

Export ADAMS/Solver File

Figure 5 displays the panel used to export the ADAMS/Solver file in adm file format which can be input directly into ADAMS/Solver and run. This feature permits running LifeMOD/BodySIM on distributed computing environments where separate processors may be involved with model setup, analysis and results processing.

When running the ADAMS/Solver separately, it is critical that the LifeMOD_Solver.dll dynamic linked library be referenced. This file is stored in the [adams_installation]/LifeMOD directory. Details on how to run external dll files with ADAMS/Solver are included in the standard ADAMS documentation.

Figure 5: Panel used to export the model in the SLF format